From 0cfe17a55d288770a1cb884a07345263f4816839 Mon Sep 17 00:00:00 2001
From: w00t <w00t@e03df62e-2008-0410-955e-edbf42e46eb7>
Date: Wed, 17 Feb 2010 12:54:10 +0000
Subject: Check for <user>:<password> for ldap auth in /PASS password if
 ident/nickname method fails, this allows people with long uids/invalid uids
 to still auth to LDAP. Thanks to stezz.

git-svn-id: http://svn.inspircd.org/repository/trunk/inspircd@12486 e03df62e-2008-0410-955e-edbf42e46eb7
---
 src/modules/extra/m_ldapauth.cpp | 36 +++++++++++++++++++++++++++---------
 1 file changed, 27 insertions(+), 9 deletions(-)

(limited to 'src/modules/extra')

diff --git a/src/modules/extra/m_ldapauth.cpp b/src/modules/extra/m_ldapauth.cpp
index 0b3dbb174..95882df47 100644
--- a/src/modules/extra/m_ldapauth.cpp
+++ b/src/modules/extra/m_ldapauth.cpp
@@ -137,6 +137,13 @@ public:
 			if (!Connect())
 				return false;
 
+		if (user->password.empty())
+		{
+			if (verbose)
+				ServerInstance->SNO->WriteToSnoMask('c', "Forbidden connection from %s!%s@%s (No password provided)", user->nick.c_str(), user->ident.c_str(), user->host.c_str());
+			return false;
+		}
+
 		int res;
 		// bind anonymously if no bind DN and authentication are given in the config
 		struct berval cred;
@@ -168,9 +175,26 @@ public:
 		std::string what = (attribute + "=" + (useusername ? user->ident : user->nick));
 		if ((res = ldap_search_ext_s(conn, base.c_str(), searchscope, what.c_str(), NULL, 0, NULL, NULL, NULL, 0, &msg)) != LDAP_SUCCESS)
 		{
-			if (verbose)
-				ServerInstance->SNO->WriteToSnoMask('c', "Forbidden connection from %s!%s@%s (LDAP search failed: %s)", user->nick.c_str(), user->ident.c_str(), user->host.c_str(), ldap_err2string(res));
-			return false;
+			// Do a second search, based on password, if it contains a :
+			// That is, PASS <user>:<password> will work.
+			if ((size_t pos = user->password.find(":")) != std::string::npos)
+			{
+				res = ldap_search_ext_s(conn, base.c_str(), searchscope, user->password.substr(0, pos), NULL, 0, NULL, NULL, NULL, 0, &msg);
+
+				if (res)
+				{
+					// Trim the user: prefix, leaving just 'pass' for later password check
+					user->password = user->password.substr(pos + 1, user->password.length());
+				}
+			}
+
+			// It may have found based on user:pass check above.
+			if (!res)
+			{
+				if (verbose)
+					ServerInstance->SNO->WriteToSnoMask('c', "Forbidden connection from %s!%s@%s (LDAP search failed: %s)", user->nick.c_str(), user->ident.c_str(), user->host.c_str(), ldap_err2string(res));
+				return false;
+			}
 		}
 		if (ldap_count_entries(conn, msg) > 1)
 		{
@@ -186,12 +210,6 @@ public:
 			ldap_msgfree(msg);
 			return false;
 		}
-		if (user->password.empty())
-		{
-			if (verbose)
-				ServerInstance->SNO->WriteToSnoMask('c', "Forbidden connection from %s!%s@%s (No password provided)", user->nick.c_str(), user->ident.c_str(), user->host.c_str());
-			return false;
-		}
 		cred.bv_val = (char*)user->password.data();
 		cred.bv_len = user->password.length();
 		if ((res = ldap_sasl_bind_s(conn, ldap_get_dn(conn, entry), LDAP_SASL_SIMPLE, &cred, NULL, NULL, NULL)) == LDAP_SUCCESS)
-- 
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